High
Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
Type: advisorySources: OSV
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-106505
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 22:15 UTC · Revision 1
Source evidence
Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend
core-osv · Original sourcePublished 6 Oct 2026, 21:43 UTC
Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.
osv:CVE-2026-106505
Complete source record
{
"id": "11f33967d233dbef40ac36a6c0043c70a0279a894b0ecbbc1761b84693ca3bd9",
"url": "https://osv.dev/vulnerability/CVE-2026-106505",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Backstage: Bypass of MkDocs configuration sanitizer in TechDocs backend",
"summary": "Backstage is an open framework for building developer portals. Prior to 1.14.6 and 1.15.4, the @backstage/plugin-techdocs-node package is affected by bypass of mkdocs configuration sanitizer in techdocs backend. Users with the ability to commit changes to a repository that uses TechDocs can circumvent the MkDocs configuration file sanitizer introduced in response to CVE-2026-25153 and execute arbitrary code on the TechDocs backend host during documentation generation. This issue is fixed in versions 1.14.6 and 1.15.4.",
"evidence": "osv:CVE-2026-106505",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2026-106505",
"aliases": [
"CVE-2026-106505",
"GHSA-p75x-jh7p-ppcx"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:L"
}
],
"affected": [
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106505.json"
}
}
],
"modified": "2026-10-28T02:30:24.243492489Z",
"provider": "osv",
"references": [
"https://github.com/backstage/backstage/releases/tag/v1.50.5",
"https://github.com/backstage/backstage/releases/tag/v1.54.6",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106505.json",
"https://github.com/backstage/backstage/security/advisories/GHSA-p75x-jh7p-ppcx",
"https://nvd.nist.gov/vuln/detail/CVE-2026-106505",
"https://github.com/backstage/backstage/commit/a7d995f11a5d27f0efbdbe8bb6c21b06988c79c9",
"https://github.com/backstage/backstage/commit/ef92d3d2b76046205c580e7152956514c15640db"
],
"provider_metadata": {
"cwe_ids": [
"CWE-426",
"CWE-436"
],
"cna_assigner": "GitHub_M",
"unresolved_ranges": [
{
"extracted_events": [
{
"range": [
{
"fixed": "1.14.6"
},
{
"introduced": "1.15.0"
},
{
"fixed": "1.15.4"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
}
]
}
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106505.json"
}
},
"related_cves": [
{
"value": "CVE-2026-106505",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 490501,
"published_at": "2026-10-06T21:43:08.37+00:00"
}